[gtk+] texthandle: Set a bigger input shape, covering the line height

[Matthias Clasen <matthiasc src gnome org>]

commit a97178af65072e98605b2ce168ee4cc36f684ca2
Author: Carlos Garnacho <carlos lanedo com>
Date:   Fri Jan 11 17:22:02 2013 +0100

    texthandle: Set a bigger input shape, covering the line height
    
    Now, even if the handles being rendered are small, the handle touch
    input shape will be as wide as the visible part of the rendered asset, and
    high enough to cover both the handle and the height of the line where
    the selection bound is.
    
    Also, make handles have the same virtual distance to the line top/bottom
    when a drag starts, so the handle doesn't jump to another line after a
    too short threshold.

 gtk/gtktexthandle.c |   33 ++++++++++++++++++++++++++++++---
 1 files changed, 30 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtktexthandle.c b/gtk/gtktexthandle.c
index fd1d966..bb0f851 100644
--- a/gtk/gtktexthandle.c
+++ b/gtk/gtktexthandle.c
@@ -106,6 +106,9 @@ _gtk_text_handle_draw (GtkTextHandle         *handle,
   cairo_set_source_rgba (cr, 0, 0, 0, 0);
   cairo_paint (cr);
 
+  if (pos == GTK_TEXT_HANDLE_POSITION_SELECTION_END)
+    cairo_translate (cr, 0, priv->windows[pos].pointing_to.height);
+
   gtk_style_context_save (priv->style_context);
   gtk_style_context_add_class (priv->style_context,
                                GTK_STYLE_CLASS_CURSOR_HANDLE);
@@ -136,6 +139,7 @@ _gtk_text_handle_update_shape (GtkTextHandle         *handle,
                                GtkTextHandlePosition  pos)
 {
   GtkTextHandlePrivate *priv;
+  cairo_rectangle_int_t rect;
   cairo_surface_t *surface;
   cairo_region_t *region;
   cairo_t *cr;
@@ -159,6 +163,15 @@ _gtk_text_handle_update_shape (GtkTextHandle         *handle,
   else
     gdk_window_shape_combine_region (window, region, 0, 0);
 
+  cairo_region_get_extents (region, &rect);
+  cairo_region_destroy (region);
+
+  /* Preserve x/width, but extend input shape
+   * vertically to all window height */
+  rect.y = 0;
+  rect.height = gdk_window_get_height (window);
+  region = cairo_region_create_rectangle (&rect);
+
   gdk_window_input_shape_combine_region (window, region, 0, 0);
 
   cairo_surface_destroy (surface);
@@ -278,6 +291,8 @@ gtk_text_handle_widget_event (GtkWidget     *widget,
       if (pos == GTK_TEXT_HANDLE_POSITION_SELECTION_START)
         y += height;
 
+      y += priv->windows[pos].pointing_to.height / 2;
+
       g_signal_emit (handle, signals[HANDLE_DRAGGED], 0, pos, x, y);
     }
 
@@ -306,11 +321,10 @@ _gtk_text_handle_update_window_state (GtkTextHandle         *handle,
       y = handle_window->pointing_to.y;
       _gtk_text_handle_get_size (handle, &width, &height);
 
-      if (pos == GTK_TEXT_HANDLE_POSITION_CURSOR)
-        y += handle_window->pointing_to.height;
-      else
+      if (pos != GTK_TEXT_HANDLE_POSITION_CURSOR)
         y -= height;
 
+      height += handle_window->pointing_to.height;
       x -= width / 2;
 
       gdk_window_move_resize (handle_window->window, x, y, width, height);
@@ -628,6 +642,9 @@ _gtk_text_handle_set_mode (GtkTextHandle     *handle,
   _gtk_text_handle_update_shape (handle,
                                  priv->windows[GTK_TEXT_HANDLE_POSITION_CURSOR].window,
                                  GTK_TEXT_HANDLE_POSITION_CURSOR);
+  _gtk_text_handle_update_shape (handle,
+                                 priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window,
+                                 GTK_TEXT_HANDLE_POSITION_SELECTION_START);
 
   _gtk_text_handle_update_window_state (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_START);
   _gtk_text_handle_update_window_state (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_END);
@@ -651,6 +668,7 @@ _gtk_text_handle_set_position (GtkTextHandle         *handle,
 {
   GtkTextHandlePrivate *priv;
   HandleWindow *handle_window;
+  gboolean size_changed;
 
   g_return_if_fail (GTK_IS_TEXT_HANDLE (handle));
 
@@ -667,6 +685,9 @@ _gtk_text_handle_set_position (GtkTextHandle         *handle,
        pos != GTK_TEXT_HANDLE_POSITION_CURSOR))
     return;
 
+  size_changed = (rect->width != handle_window->pointing_to.width ||
+                  rect->height != handle_window->pointing_to.height);
+
   handle_window->pointing_to = *rect;
   handle_window->has_point = TRUE;
   gdk_window_get_root_coords (priv->relative_to,
@@ -675,6 +696,9 @@ _gtk_text_handle_set_position (GtkTextHandle         *handle,
                               &handle_window->pointing_to.y);
 
   _gtk_text_handle_update_window_state (handle, pos);
+
+  if (size_changed)
+    _gtk_text_handle_update_shape (handle, handle_window->window, pos);
 }
 
 void
@@ -699,6 +723,9 @@ _gtk_text_handle_set_visible (GtkTextHandle         *handle,
   if (!window)
     return;
 
+  if (!gdk_window_is_visible (window))
+    _gtk_text_handle_update_shape (handle, window, pos);
+
   priv->windows[pos].user_visible = visible;
   _gtk_text_handle_update_window_state (handle, pos);
 }